Historians believe that a culture of celebrating birthdays took its path from ancient Rome where people first started to celebrate birthdays of family members, friends, and business contacts with gits, banquets, and prayers. Nowadays birthdays are mostly cherished by children, but before it was a mostly adult thing. And for a modern community, it's rather an unusual thing to leave someone out of the celebration of such a special day as a birthday, it's at least unfair. But what to do if you are a shark and want to celebrate your birthday? Sharks are even older than the Roman Empire and also have a right to celebrate their BDay. So our fearsome creature took out a hat and balloons and is now ready to celebrate. An animal custom progress bar for YouTube with Happy Birthday Shark.